Materials and Grades

The material and grade of a magnet refer to a set of properties which ultimately yield the magnet's performance. The majority of the magnets sold by Amazing Magnets are Neodymium Iron Boron (NdFeB) , and most of our stock products are Grade N40 . Other common materials such as SmCo, AlNiCo, Ferrite, and rubberized magnets are also listed as these can be produced to order as custom products. If you have any questions feel free to give us a call (8888-727-3327)

   Available Materials:  
 

• Neodymium Iron Boron (NdFeB)

Strongest permanent magnet material commercially available. Plated to avoid oxidization.
 

• Samarium Cobalt (SmCo)

Weaker than NdFeB Magnets. Higher Maximum operating temperature.
 

• Bonded Neodymium Iron Boron (NdFeB)

Cast / Molded NdFeB suspended in an epoxy resin, Lower strength than SmCo. Requires mold tooling.
 

• Ferrite (Ceramic)

Hard and highly brittle. High operating temperatures. Highly corrosion resistant. Weaker than NdFeB Magnets.
 

• Flexible (Rubberized)

Ferrite magnet powder suspended in rubber a rubber resin. Corrosion resistant, Magnetic field is easily disrupted and changed by stronger magnets.

 

Sintered Neodymium Iron Boron (NdFeB)

Sintered NdFeB magnets are strong permanent magnets made of an alloy of neodyumium, Iron, and Boron. NdFeB Magnets are the strongest available materials, but have a lower maximum temperature. NefeB Magnets Will oxidize fairly rapidly, so an anti-corrosive coating is needed to protect the substrate. See Plating and Coating options for more information.
 

Grade Name Br (KG) HcB (KOe) Hci (KOe)  BHmax(MGOe) Tmax
N35 11.7-12.2 ≥10.9 ≥12.0
33-36 80C / 176F
N38 12.2-12.5 ≥10.9 ≥12.0 36-39 80C / 176F
N40 12.5-12.8 11.4 ≥12.0 38-41 80C / 176F
N42 12.8-13.2 11.5 ≥12.0 40-43 80C / 176F
N45 13.2-13.8 11.6 ≥12.0 43-46 80C / 176F
N48 13.8-14.2 11.6 ≥12.0 46-49 80C / 176F
N50 14.0-14.5 10.0 ≥11.0 48-51 70C / 158F
N52 14.3-14.8 10.0 ≥11.0 50-53 70C / 158F
30M 10.8-11.3 10.0  14.0   28-31 100C / 212F
33M 11.3-11.7 10.5 14.0 31-33 100C / 212F
35M 11.7-12.2  10.9 14.0 33-36 100C / 212F
38M 12.2-12.5 11.3 14.0 36-39 100C / 212F
40M 12.5-12.8 11.6 14.0 38-41 100C / 212F
42M 12.8-13.2 12.0 14.0 40-43 100C / 212F
45M 13.2-13.8 12.5 14.0 43-46 100C / 212F
48M 13.6-14.3 12.9 14.0 46-49 100C / 212F
50M 14.0-14.5 13.0 14.0 48-51 100C / 212F
30H 10.8-11.3 10.0 17.0 28-31 120C / 248F
33H 11.3-11.7 10.5 ≥17.0 31-34 120C / 248F
35H 11.7-12.2 10.9 ≥17.0 33-36 120C / 248F
38H 12.2-12.5 11.3 ≥17.0 36-39 120C / 248F
40H 12.5-12.8 11.6  ≥17.0 38-41 120C / 248F
42H 12.8-13.2 12.0  ≥17.0 40-43 120C / 248F
45H 13.2-13.8 12.0  ≥17.0 43-46 120C / 248F
48H 13.7-14.3 12.5  ≥17.0 46-49 120C / 248F
30SH 10.8-11.3 10.1 ≥20.0 28-31 150C / 302F
33SH 11.3-11.7 10.6 ≥20.0 31-34 150C / 302F
35SH 11.7-12.2 11.0 ≥20.0 33-36 150C / 302F
38SH 12.2-12.5 11.4 ≥20.0 36-39 150C / 302F
40SH 12.4-12.8 11.8 ≥20.0 38-41 150C / 302F
42SH 12.8-13.2 12.4 ≥20.0 40-43 150C / 302F
45SH 13.2-13.8 12.6 ≥20.0 43-46 150C / 302F
28UH 10.2-10.8 ≥9.6 ≥25.0  26-29 180C / 356F
30UH 10.8-11.3 ≥10.2 ≥25.0  28-31 180C / 356F
33UH 11.3-11.7 ≥10.7 ≥25.0  31-34 180C / 356F
35UH 11.8-12.2 ≥10.8 ≥25.0  33-36 180C / 356F
38UH 12.2-12.5 ≥11.3 ≥25.0  36-39 180C / 356F
40UH 12.4-12.8 ≥11.3 ≥25.0  38-41 180C / 356F
28EH 10.4-10.9 ≥9.8 ≥30.0  26-29 200C / 392F
30EH 10.8-11.3 ≥10.2 ≥30.0  28-31 200C / 392F
33EH 11.3-11.7 ≥10.5 ≥30.0  31-34 200C / 392F
35EH 11.7-12.2 ≥11.0 ≥30.0  33-36 200C / 392F
38EH 12.2-12.5 ≥11.3 ≥30.0  36-39 200C / 392F



Samarium Cobalt (SmCo)

SmCo magnets are made of a strong permanent magnet alloy of samarium and cobalt. Compared to NdFeB magnets, SmCo magnets are weaker, but are more suiteable for working in higher temperatures. SmCo magnets are very anti-corrosive and generally do not require electroplated surface treatment.
 

Grade Name Br (KG) HcB (KOe) Hci (KOe)  BHmax(MGOe) Tmax
YX18 8.5-9.0 ≥7.8-8.2 ≥15-19 16-18 250C / 482F
YX20 9.2-9.6 ≥8.2-9.0 ≥15-19
19-21 250C / 482F
YX24 9.6-10.0 ≥9.2-9.7 ≥15-19
22-24 250C / 482F
YXH24 9.5-10.2 ≥8.0-9.2 ≥18-25 22-24 300C / 572F
YXG26 10.2-10.5 ≥9.4-10.0 ≥18-25
24-26 300C / 572F
YXG28 10.5-10.8 ≥9.5-10.0 ≥18-25
26-28 300C / 572F
YXG28B 10.2-11.0 ≥5.2-6.5 ≥5.5-6.5 26-28 300C / 572F
YXG30 10.8-11.0 ≥9.8-10.5 ≥18-25 28-30 300C / 572F
YXG30B 10.8-11.0 ≥5.2-5.6 ≥5.5-6.5 28-30 300C / 572F



Bonded Neodymium Iron Boron (NdFeB)

Bonded NdFeB is a cast/molded type of NdFeB which can be further machined and pressed into different shapes like rings, arcs, and many more complex geometries. It also has a higher corrosion resistance compared with sintered NdFeB. Bonded magnets offer less magnetic strength than sintered magnets s but can be formed into intricately shaped parts.
 

Grade Name Br (KG) HcB (KOe) Hci (KOe)  BHmax(MGOe) Tmax
BDM-4 3.5-4.5 ≥3.0-3.5 ≥8-10 3-4 120C / 248F
BDM-6 5.0-6.0 ≥4.0-4.5 ≥8-10
5-7 120C / 248F
BDM-8 5.5-6.5 ≥4.5-5.0 ≥12-14
5-8.5 150C / 302F
BDM10 6.5-7.0 ≥5.0-5.5 ≥8-10 9-10 150C / 302F
BDM-12 7.0-8.0
≥5.5-6.0 ≥9-11
10-12 80C / 176F
BDM-L 7.0-8.0 ≥2.0-2.5 ≥2.2-3.0
4.5-6.5 80C / 176F



Aluminum Nickel Cobalt (AlNiCo)

AlNiCo magnets are very stable and have good corrosion resistance and a typical hardness of 50 Rockwell C. AlNiCo represents the most versatile magnet material available. The range of properties can be accurately designed for specific applications by changes to element analysis and heat treatment.
 

Grade Name Br (KG) HcB (KOe) BHmax(MGOe) Tmax
LN9 6.8 ≥0.38 1.13 450C / 842F
LN10 6.0 ≥0.5 1.2 450C / 842F
LNG12 7.2 ≥0.5 1.55 450C / 842F
LNG13 7.0 ≥0.6 1.6 450C / 842F
LNG34 12.0 ≥0.6 4.3 525C / 977F
LNG37 12.0 ≥0.6 4.65 525C / 977F
LNG40 12.5 ≥0.6 5.0 525C / 977F
LNG44 12.5 ≥0.65 5.5 525C / 977F
LNG52 13.0 ≥0.7 6.5 525C / 977F
LNGT28 10.0 0.72 3.5 550C / 1022F
LNGT36J 7.0 1.75 4.5 550C / 1022F
LNGT32 8.0 1.25 4.0 550C / 1022F
LNGT40 8.0 1.38 5.0 550C / 1022F
LNGT60 9.0 1.38 7.5 550C / 1022F
LNGT72 1.05 1.4 9.0 550C / 1022F



Ferrite (Ceramic)

Ceramic, also known as Ferrite magnets are made of a composite of iron oxide and barium/strontium carbonate by ceramic processing technology. Ferrites are, like most other ceramics, hard and brittle. In terms of the magnetic properties, ferrites are often classified as "soft" and "hard" which refers to their low or high coercivity of their magnetism, respectively.
 

Grade Name Br (KG) HcB (KOe) Hci (KOe)  BHmax(MGOe) Tmax
C1 2.3 1.86 3.5 1.05 250C / 482F
C5 3.8 2.4 2.5 3.4 250C / 482F
C7 3.4 3.23 4.0 2.75
250C / 482F
C8 3.85 2.95 3.05 3.5 250C / 482F
C8B 4.2 2.913 2.96 4.12 250C / 482F
C9 3.8 3.516 4.01 3.32 250C / 482F
C10 4.0 3.617 3.51 3.82 250C / 482F
C11 4.3 2.512 2.56 4.32 250C / 482F




Flexible (Rubber)

Flexible Rubber magnets are made by mixing Ferrite or Neodymium magnet powders and synthetic or natural rubber binders. They are made by rolling (calendaring) or extrusion methods. Flexible magnets are applied because of their advantages of versatility, low cost, and ease of use. These magnets are usually manufactured in strip or sheet form that is widely used in micro-motors, gaskets, novelties, signs, and displays.
 

Grade Name Br (KG) HcB (KOe) Hci (KOe)  BHmax(MGOe) Tmax
FRM-5 1.55-1.75 1.25-1.45 1.55-1.75 0.60-0.70 80C / 176F
FRM-6 1.6-1.8 1.3-1.5 1.60-1.80 0.65-0.75 80C / 176F
FRM-8 2.15-2.25 1.6-1.8 1.90-2.10 0.95-1.05
80C / 176F
FRM-11 2.4-2.5 1.65-1.85 1.75-1.95 1.35-1.45 80C / 176F
FRM-12 2.45-2.5 2.0-2.2 2.70-2.90 1.45-1.55 80C / 176F





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